Pope Francis, Donald Wuerl

Pope Francis stands with Cardinal Donald Wuerl, archbishop of Washington, right, as the pontiff expresses his disappointment that he can't stay longer to greet everyone following the Midday Prayer from the Liturgy of Hours, the daily form of prayer of the Catholic Church, with bishops from the United States on Wednesday at the Cathedral of St. Matthew the Apostle in Washington.

Pope Francis, center, standing with Cardinal Donald Wuerl, archbishop of Washington, right, expresses his disappointment that he can’t stay longer to greet everyone following the midday prayer from the Liturgy of Hours, the daily form of prayer of the Catholic Church, with bishops from the U.S., Wednesday, Sept. 23, 2015, at the Cathedral of St. Matthew the Apostle in Washington. (AP Photo/Susan Walsh)